<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator="/">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮 -->
			<el-row>
				<el-col><el-button type="primary" @click="addDialogVisible = true">添加角色</el-button></el-col>
			</el-row>
			<!-- 角色列表区域 -->
			<el-table :data="roleList" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
								<i class="el-icon-arrow-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过for循环，嵌套渲染二级权限 -->
								<el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
										<i class="el-icon-arrow-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">
											{{ item3.authName }}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column lable="角色名称" prop="roleName"></el-table-column>
				<el-table-column lable="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column lable="操作" width="300px">
					<template slot-scope="scope">
						<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRole(scope.row.id)">删除</el-button>
						<el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>

		<!-- 添加角色的对话框 -->
		<el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
			<!-- 内容主体区域 -->
			<el-form ref="addFormRef" :model="addForm" label-width="70px" :rules="addFormRules" hide-required-asterisk :status-icon="true" v-loading="formLoading">
				<el-form-item label="角色名" prop="roleName"><el-input v-model="addForm.roleName"></el-input></el-form-item>
				<el-form-item label="角色描述"><el-input v-model="addForm.roleDesc"></el-input></el-form-item>
			</el-form>
			<!-- 底部按钮区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRole">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 修改角色的对话框 -->
		<el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<!-- 内容主体区域 -->
			<el-form ref="editFormRef" :model="editForm" label-width="70px" :rules="editFormRules" hide-required-asterisk :status-icon="true" v-loading="editFormLoading">
				<el-form-item label="角色ID"><el-input v-model="editForm.roleId" disabled></el-input></el-form-item>
				<el-form-item label="角色名" prop="roleName"><el-input v-model="editForm.roleName"></el-input></el-form-item>
				<el-form-item label="角色描述"><el-input v-model="editForm.roleDesc"></el-input></el-form-item>
			</el-form>
			<!-- 底部按钮区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editRole">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 分配权限对话框 -->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
			<!-- 树形控件 -->
			<el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRightDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="allotRights">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
export default {
	data() {
		return {
			// 所有角色列表数据
			roleList: [],
			// 控制分配权限对话框的显示与隐藏
			setRightDialogVisible: false,
			// 所有权限的数据
			rightsList: [],
			// 树形控件的属性绑定对象
			treeProps: {
				label: 'authName',
				children: 'children'
			},
			// 默认选中的节点
			defKeys: [],
			// 即将分配权限的角色ID
			roleId:'',
			// 添加角色对话框
			addDialogVisible: false,
			// 编辑角色对话框
			editDialogVisible: false,
			// 表单loading
			formLoading: false,
			// 编辑loading
			editFormLoading: false,
			// 添加角色表单
			addForm: {
				roleName: '',
				roleDesc: ''
			},
			// 添加角色表单验证
			addFormRules: {
				roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }, { min: 2, max: 12, message: '长度在2到12个字符', trigger: 'blur' }]
			},
			// 编辑角色表单
			editForm: {},
			// 修改表单的验证规则对象
			editFormRules: {
				roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }, { min: 2, max: 12, message: '长度在2到12个字符', trigger: 'blur' }]
			}
		}
	},
	created() {
		this.getRolesList()
	},
	methods: {
		// 获取所有角色的列表信息
		async getRolesList() {
			const { data: res } = await this.$http.get('roles')
			if (res.meta.status !== 200) {
				return this.$message.error('获取角色列表失败！')
			}
			this.roleList = res.data
			console.log('获取角色列表成功')
		},
		// 根据ID删除对应权限
		async removeRightById(role, rightId) {
			// 弹窗提示用户是否删除
			const confirmResult = await this.$confirm('此操作将删除该权限，是否继续？', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)
			if (confirmResult !== 'confirm') {
				return this.$message.info('取消删除')
			}
			const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
			if (res.meta.status !== 200) {
				return this.$message.error('删除失败')
			}
			this.$message.success('删除成功')
			role.children = res.data
		},
		// 打开分配权限对话框
		async showSetRightDialog(role) {
			this.roleId = role.id
			// 获取所有权限数据
			const { data: res } = await this.$http.get('rights/tree')
			if (res.meta.status !== 200) {
				return this.$message.error('获取权限失败！')
			}
			// 把获取到的权限数据保存到data中
			this.rightsList = res.data
			// 递归获取三级节点的ID
			this.getLeafKeys(role, this.defKeys)
			this.setRightDialogVisible = true
		},
		// 通过递归的形式,获取角色下所有三级权限的ID,并保存到defkeys数组中
		getLeafKeys(node, arr) {
			// 如果当前node节点不包含children属性，则是三级节点
			if (!node.children) {
				return arr.push(node.id)
			}
			node.children.forEach(item => {
				this.getLeafKeys(item, arr)
			})
		},
		// 监听分配权限对话框的关闭事件
		setRightDialogClosed() {
			this.defKeys = []
		},
		// 点击为角色分配权限
		async allotRights(){
			const keys = [			
				...this.$refs.treeRef.getCheckedKeys(),
				...this.$refs.treeRef.getHalfCheckedKeys()
			]
			// console.log(keys)
			const idStr = keys.join(',')
			const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
			if(res.meta.status !== 200){
				return this.$message.error('分配权限失败！')
			}
			this.$message.success('分配权限成功！')
			this.getRolesList()
			this.setRightDialogVisible = false
		},
		// 添加角色
		addRole() {
			this.$refs.addFormRef.validate(async valid => {
				if (!valid) return
				// 加载中
				this.formLoading = true
				// 可以发起添加用户的网络请求
				const { data: res } = await this.$http.post('roles', this.addForm)
				console.log(res)
				if (res.meta.status !== 201) {
					this.formLoading = false
					return this.$message.error(res.meta.msg)
				}
				this.$message.success('添加角色成功！')
				// 隐藏添加用户的对话框
				this.formLoading = false
				this.addDialogVisible = false
				// 重新获取用户列表数据
				this.getRolesList()
			})
		},
		// 监听添加角色对话框的关闭事件
		addDialogClosed() {
			this.$refs.addFormRef.resetFields()
			this.addForm.roleDesc = ''
		},
		// 展示编辑角色的对话框
		async showEditDialog(id) {
			// console.log(id)
			this.editDialogVisible = true
			this.editFormLoading = true
			const { data: res } = await this.$http.get('roles/' + id)
			if (res.meta.status !== 200) {
				return this.$message.error('查询角色信息失败！请刷新重试')
			}
			this.editForm = res.data
			this.editFormLoading = false
		},
		// 监听修改角色对话框的关闭事件
		editDialogClosed() {
			this.$refs.editFormRef.resetFields()
		},
		// 修改角色信息提交
		async editRole() {
			this.$refs.editFormRef.validate(async valid => {
				if (!valid) return
				// 发起修改角色信息的网络请求
				this.editFormLoading = true
				const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
				console.log(res)
				if (res.meta.status !== 200) {
					this.editFormLoading = false
					return this.$message.error(res.meta.msg)
				}
				this.editFormLoading = false
				// 关闭对话框
				this.editDialogVisible = false
				// 刷新数据列表
				this.getRolesList()
				// 提示修改成功
				this.$message.success('修改角色信息成功')
			})
		},
		// 根据ID删除对应角色
		async removeRole(id) {
			const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)
			// 如果用户确认删除，返回值为字符串 confirm
			// 如果用户取消删除，返回值为字符串 cancle
			console.log(confirmResult)
			if (confirmResult !== 'confirm') {
				return this.$message.info('取消删除')
			}
			const { data: res } = await this.$http.delete('roles/' + id)
			if (res.meta.status !== 200) {
				return this.$message.error('删除角色失败！')
			}
			this.$message.success('删除成功')
			this.getRolesList()
		}
	}
}
</script>

<style lang="scss" scoped>
.el-tag {
	margin: 8px;
}
.bdtop {
	border-top: 1px solid #eee;
}
.bdbottom {
	border-bottom: 1px solid #eee;
}
.vcenter {
	display: flex;
	align-items: center;
}
</style>
